Doomsday Device

Doomsday Device enters the battlefield tapped.
{p/r}{p/r}{p/r}{p/r}{e}{e}{e}{e}{e}{e}{e}{t}, exile Doomsday
Device: Destroy all creatures. For each creature destroyed this way, their controller draws 2 cards.
Then, each player discards their hand, then exiles
each card in their graveyard.
Scans indicate this device contains enough potential
energy to destroy the entire planet, along with most of
the solar system.